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Structural Source Identification from Acoustic Measurements Using an Energetic Approach

Published online by Cambridge University Press:  15 May 2017

A. Samet ,
M. A. Ben Souf ,
O. Bareille ,
M. N. Ichchou ,
T. Fakhfakh  and
M. Haddar
A. Samet
Affiliation:
Laboratoire de Tribologie et Dynamique des Systèmes (LTDS)Ecole Centrale LyonLyon, France Mechanics, Modelling and Production Laboratory (LA2MP)Ecole Nationale d'Ingénieurs de SfaxSfax, Tunisie
M. A. Ben Souf*
Affiliation:
Laboratoire de Tribologie et Dynamique des Systèmes (LTDS)Ecole Centrale LyonLyon, France Mechanics, Modelling and Production Laboratory (LA2MP)Ecole Nationale d'Ingénieurs de SfaxSfax, Tunisie
O. Bareille
Affiliation:
Laboratoire de Tribologie et Dynamique des Systèmes (LTDS)Ecole Centrale LyonLyon, France
M. N. Ichchou
Affiliation:
Laboratoire de Tribologie et Dynamique des Systèmes (LTDS)Ecole Centrale LyonLyon, France
T. Fakhfakh
Affiliation:
Mechanics, Modelling and Production Laboratory (LA2MP)Ecole Nationale d'Ingénieurs de SfaxSfax, Tunisie
M. Haddar
Affiliation:
Mechanics, Modelling and Production Laboratory (LA2MP)Ecole Nationale d'Ingénieurs de SfaxSfax, Tunisie
*
*Corresponding author ([email protected])
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Abstract

An inverse energy method for the identification of the structural force in high frequency ranges from radiated noise measurements is presented in this paper. The radiation of acoustic energy of the structure coupled to an acoustic cavity is treated using an energetic method called the simplified energy method. The main novelty of this paper consists in using the same energy method to solve inverse structural problem. It consists of localization and quantification of the vibration source through the knowledge of acoustic energy density. Numerical test cases with different measurement points are used for validation purpose. The numerical results show that the proposed method has an excellent performance in detecting the structural force with a few acoustical measurements.

Keywords

Source localizationInverse simplified energy methodInverse problemHigh frequencies
Type
Research Article
Information
Journal of Mechanics , Volume 34 , Issue 4 , August 2018 , pp. 431 - 441
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2018 

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